Afghan National law enforcement officials are seen during this file photo. AP Photo

The soldiers, two of whom were serving with the 1st Battalion Welsh Guards and the other with the Royal Corps of Signals, received first aid at the scene after yesterday’s attack but died of their injuries.

They had been working in an Afghan Police Advisory Team and were leaving a shura – or meeting of elders – at Checkpoint Kamparack Pul in Nahr-e-Saraj when they were shot.

An investigation into the incident has been launched after this latest “green on blue” attack in which Afghan cops open fire on international allies